Related Experiment Video
Updated: May 30, 2025
10:49
Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy
Published on: March 5, 2017
13.2K
Lipid Curvature and Fluidity Influence Lipid Incorporation Disparities in Nanodiscs
Marina C Sarcinella1, Joshua D Jones1, Matthew J Sorensen1
1Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109, United States.
Analytical Chemistry
|January 31, 2025
Summary
This study reveals that lipids do not always incorporate into nanodiscs as expected, impacting their structure and function. Understanding this lipid incorporation is key for accurate membrane protein studies.
Area of Science:
- Biochemistry
- Biophysics
- Membrane Biology
Background:
- Nanodiscs are valuable membrane mimetics for in vitro protein studies.
- Current nanodisc lipid compositions often lack native membrane complexity.
- Characterization of multi-lipid nanodiscs is limited.
Purpose of the Study:
- To develop methods for analyzing lipid composition in nanodiscs.
- To investigate nonstoichiometric lipid incorporation into nanodiscs.
- To create more accurate nanodisc models of biological membranes.
Main Methods:
- Coupled nanodisc formation, purification, and LC-MS/MS analysis.
- Screened various lipids based on headgroups and acyl chains.
- Formed and characterized nanodiscs with endoplasmic reticulum-inspired lipid compositions.
Main Results:
- Lipid incorporation into nanodiscs varied from expected levels.
- Lipid incorporation disparities increased with lipids inducing membrane curvature or rigidity.
- Adding even one additional lipid altered nanodisc diameter and dispersity.
- Endoplasmic reticulum-mimicking nanodiscs showed native-like cholesterol dynamics and modulated fluidity.
Conclusions:
- Provides a foundation for understanding nonstoichiometric lipid incorporation in nanodiscs.
- Establishes a basis for improved nanodisc characterization and quality control.
- Enables more accurate modeling of biological systems for membrane protein research.
More Related Videos
Related Concept Videos
01:26Membrane Fluidity
10.9K
Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is...
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is...
10.9K
01:35Asymmetric Lipid Bilayer
7.2K
Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
7.2K